Apparatus for controlling the wind supply and pressure in organs.



- no. 69L900; Patented Jan. 28, 190 2.

J. m0. GALE. YAPPARATUS FOR CONTROLLING THE WIND SUPPLY AND PRE$SURE IN DRGANS.

(Application filed May 11. 1901. (.No Model.)

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a considerable range of expression.

UNITE STATES A'rENT FF C APPARATUS FOR CONTROLLING THE WIND SUPPLY AND PRE SSURE lN ORGANS.

SPECIFICATION forming part of Letters Patent No. 691 ,900, dated January 28, 1902.

Application filed May 11, 1901 To all whmn it-may concern:

Be it known that 1, JAMES RANDOLPH OOUETENAY GALE, clerk in Holy Orders, re-

siding at Ghrists Church Vicarage, Sutton,'in the countyof Surrey, England, have invented certain Improved Apparatus for Controlling the Wind Supply and Pressure in Organs, Harmoniums,-an d Similar Instruments; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in apparatus for controlling the wind supply and pressure in organs,'harmoni ums, and similar instruments, whereby the performer, notwithstanding the constant Wind-pressure supplied to the trunk, is able tova'ry the wind-pressure in the wind-chest in or upon 'which the reeds or pipes are planted, and thereby obtain I attain this object by means of the mechanism illustrated in the accompanying drawings, in which like figures refer to similar parts in all the views.

Figure 1 is a longitudinal part section. Fig.

pendent supply. At a suitable point in the trunk, but preferably as near to the reeds or pipes as convenient, I insert a pierced diaphragm 2 and fit the same witha valve 3, pivoted, asat 4, and provided with leather-faced,

flanges 5. This valve is connected by the stem 6, knuckle-joint 7, and tap-wire 8, having adjustable nuts or buttons'9, with the bellows 10, which is in communication with the wind-chest 11 by the passage 12. This bellows is governed by a spring 13, which presses against the lever 14, pivoted at 15 to the post 16, its opposite end being connected in any suitable manner, as by a wire or rod 17, to the expression-pedal 18. A spring 19 is mounted on the lever 14 and connected to ablock 20 or other suitable attachment.

21 shows a reed mounted in the wind-chest Serial No. 59.722. (No model.)

covered by the pallet 22. The reed or reeds, however, may be replaced by an organ pipe or pipes, or both may be operated simultaneously.

The operation of my invention is as follows: The air from the feeder-reservoir or bellows enters the trunk usually at a constant pressure inthe direction of the arrow. It now the performer presses the pedal 18, the bellows 10 is compressed by the lever 14: and the valve 3 opened. Air from thetrunkwillnow enter the wind-chest 11 until the pressure is suflicient to overcome the tension of the spring 13, whenthe bellows 10 will raise or close the valve, thus diminishing or wholly cutting off the Wind from the independent supply. As the pressure in the wind-chest falls, the bellows 10, acted upon by the spring 13, also falls, readmitting air to the chest and restoring the pressure.

The valve 3 may bevaried to suit the particular construction of the instrument. For instance, it may be made V-shaped and pivoted, as at 23, so as to slide over a corresponding aperture 24 in the diaphragm. (See Figs. 2 and 4c. The spring 13 may also be replaced by a sliding weight or counterbalance 25, as in Fig. 2, which is adjustable.

In some cases I construct the valve as shown in Fig. 5, in which levers 26 26 are pivoted, as at 27, to the posts 28 28'. Wires 29 29 are fastened to the opposite ends of the levers and support two pallet-valves 3, closing apertures 24.. One end of the lever 26' is connected to a spring 13, fastened to the base of the wind-chest. The other end is attached to the flexible diaphragm 30, which acts by internal pressure as a bellows and is attached by a second spring 32 to the governing-lever 14.

1. In an organ the combination of the Windtrunk, wind chest and diaphragm separating them'with a valveattached to the said diaphragm and controlling the flow of wind through the same, bellows supplied with wind from said wind-chest, a device connecting the bellows with the valve, a spring controlling the said bellows and hand-operated means forvarying the tension of said spring at will substantially as set forth.

connected by a wire'3l, passing through and 2. In an organ the combination of the wind- 13 and the action of the bellows on the valve trunk and wind-chest with the intervening substantially as set forth. diaphragm 2 provided with an aperture, the In testimony that I claim the foregoing as flanged valve 3 pivoted at 4 in the said apermy invention I have signed my name in pres- 5 ture, the tap-wire 8 and bellows 10 operating ence of two subscribing Witnesses.

the said valve, the spring 13 mounted on the,

bellows and controlling the same, the lever JAMES RANDOLPH COURTEMY GALE 14 resting on said spring, the spring 19 sup- Witnesses: porting the said lever and hand-operated FRANCIS HERON ROGERS,

10 means for varying the tension of the spring FRANK DUCK. 

